Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07d82bcbc48b738…

MALICIOUS

PDF

83.2 KB Created: 2021-03-17 10:04:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3ece8acb09192ca510384735e78f0657 SHA-1: cceb23f1a73fdee1ce9bc6fa222bb2713d1ea098 SHA-256: e07d82bcbc48b738552ad9bb6702d97edaa445f879fbda561e28f15543b1de4c
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6504

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/award?keyword=numeros+primos+y+compuestos+ejercicios+resueltos+pdf PDF link annotation
    • http://alexandreablog.com/kesovuwajanupepivtfc71.pdfIn PDF document text
    • http://yewes.space/24313162967kf176.pdfIn PDF document text
    • http://bella24.xyz/kjv_study_bible7ajmu.pdfIn PDF document text
    • https://fogofude.weebly.com/uploads/1/3/4/3/134322730/pupuguwiterawusav.pdfIn PDF document text
    • https://mikatafa.weebly.com/uploads/1/3/1/3/131398449/1290158.pdfIn PDF document text
    • https://nugukijozagesek.weebly.com/uploads/1/3/0/7/130739433/6422934.pdfIn PDF document text
    • https://laxivaxof.weebly.com/uploads/1/3/0/8/130874385/xefufabedunutej-zovafipemifelo.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/d271d2.pdfIn PDF document text
    • https://guzuwifaxad.weebly.com/uploads/1/3/4/0/134096987/a434c63a0a3b.pdfIn PDF document text
    • https://dejegudiferu.weebly.com/uploads/1/3/1/8/131857494/bijidikisubuvobim.pdfIn PDF document text
    • https://luzusuzure.weebly.com/uploads/1/3/0/7/130775685/5875347.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/jevemidisig_nemakulapakez.pdfIn PDF document text
    • http://giocodigital.website/free_printable_worksheets_verbs_first_grade7nvbv.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_51129c4c729b4a98a6a686a17865f4dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/platform_beds_for_sale_near_me.pdfIn PDF document text
    • https://f64a1a0a-debf-4843-a838-a34c0cae0f4a.filesusr.com/ugd/89602e_b049ff9cf85845e5a24919af6fb0f12d.pdf?index=trueIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_dce9debb085546bcae618d78cab5a5dd.pdf?index=trueIn PDF document text
    • https://b634734f-67aa-4edc-9b69-dcf7610e4690.filesusr.com/ugd/c86859_f0bbbdc1b9684a66ae36e812b6eee9a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/puzzle_box_app_apk.pdfIn PDF document text
    • https://025b4bf0-2906-4f5f-8a0f-6d4b68fc9518.filesusr.com/ugd/148ee2_f0bc0d898403460baaffd6b3f11ada6a.pdf?index=trueIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_85af1c994a6e4d9cb8615c288c8d80d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/spider_man_bangla_comics.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11040 1528 bytes
SHA-256: 281a9eb46b2bb3379180982e115bfc80b1943605d75d1fe7b3a3f46115c7106e
font_01_sfnt_off00011808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11808 5240 bytes
SHA-256: 774209efeec13f58766017c524ea79edf97a97573d921d893326e1c82f726161
font_02_sfnt_off000129db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DB 12940 bytes
SHA-256: 4c5cab02a5bf7fc61898f10bb709921b245cbc40f2a7d7decdcdd3c05e8eeba0

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